Printing-telegraph instrument.



N0. 673,38l. L. M. CASH-LA. Patented May 7, mm.

PRINTING TELEGRAPH INSTRUMENT.

(Application filed Aug. 10, 1900.)

3 Sheets-Sheet I.

(No Model.)

INVENTOR AT ORNEYS HOYOUYNO WASNINGTOM n c.

Patented May 7, [90L LPM. CASELLA. PRINTING TELEGRAPH INSTRUMENT.

(Application filed Aug. 10, 1900 (No Model.) 3 Sheets-Sheet 27 Flow w rINVENTOH ,THE NORRIS Ptrsns 00 Pmmumnu WASHXNGTQN n c No; 673,38l.Patented May 7, l90l.

- L. M. CASELLA.

PRINTING TELEGRAPH INSTRUMENT.

(Application filed Aug. 10, 1900.)

3 5heota-Shoet 3.

(No Model.)

WUAIESSES:

Anonuevs UNITED STATES PATENT OFFICE.

LOUIS MARINO OASELLA, OF LONDON, ENGLAND.

PRINTING-TELEGRAPH INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 673,381, dated May 7,1901.

Application filed August 10, 1900. berial No. 26,479. (No model.)

To a, whom it may concern.-

Be it known that I,LoUIs MARINO GAsELLA, a subject of the Queen of GreatBritain and Ireland, residing at London, England, have invented a newand Improved Printing-Telegraph Instrument, (for which I have madeapplication for Letters Patent in Great Britain under No. 5,382, datedMarch 21, 1900,) of which the following is a specification.

This invention relates to printing-telegraph instruments in which atype-wheel is set in a known manner so as to bring a required letter inposition for printing; and it consists, essentially, of a control devicein a local relay-circuit by which the printing mechanism is set intooperation upon the cessation of the alternating circuit by which thetype disk or disks have been setin the required position for printing.

Figure 1 is an outside view of the complete instrument, showing theordinary printing mechanism. Fig. 2 is a transverse section through theinstrument on line X Y, Fig. 1. Fig. 3 is a plan of the instrument. Fig.4 is a further plan of the instrument, showing more clearly theprinting-lever and its return-lever. Fig. 5 is an elevation of theprinting-lever and its return-lever with the intervening side removed.Fig. 6 is a-detached elevation of the armature. Fig. 7 is a diagram ofthe circuits and connections to the parts of the'said instrument. thecontrol'fork, showing different positions. Fig. 9 is an end and sideelevation of the typedisk-setting mechanism detached. Fig. 10 is an endview of printing magnets and armature. Fig. 11 is an end and sideelevation of rocking piece detached and enlarged.

I will first refer to those parts of the instrument which are essentialparts of such an instrument and necessary for the understanding of theaction of the instrument; but as such main parts are of usual type andno essential part of my present invention I will not describe such partsin detail, but only refer to their position and general effect.

a is a set of electromagnets having permanent magnets I) placed overtheir poles, causing such electromagnets in a well-known way to'vibratea pivoted armature c for every alternation of an alternating circuitpassed through such magnets from a transmitter.

Fig. 8 is a detached detail of These electromagnets at are the onlyelectromagnets in the alternating circuit 1 1, Fig. 7, from thetransmitting-station. The oscillations of the armature o are transmittedby an arm 0 through the well-known pivoted anchor-pallet d andstep-wheel d, as shown in detail in Fig. 9, to the type wheel or wheelse, having an inking wheel-pad e. The oscillation of the pallet (1 setsthe type-wheel e to any desired letter over the printing-line, accordingto the number of transmitted alternate impulses from the line-wire,operated conveniently by a hand or Wheatstone transmitter in a mannerwell known.

ff are the printing-electromagnets, which are in a local relay-circuit 22, Fig. 7, energized by a battery conveniently placed in a case underthe instrument. Such electromagnets when energized by the local circuitoperate a pivoted printing-lever g by their armature g engaging in theend of the printing-lever g, and thus pressing the paper (not shown) inthe usual way up against the under face of the type Wheel or wheels ewhen the latter are set and at rest.

The above being common elements in any printing-telegraph instrument,the object of the present invention is to design a control from thetransmitted alternating current, so that the local relayprinting-circuit shall remain broken so long as the alternating currentis passing for the setting of the typewheels e and shall become closedso soon as the alternating current ceases, when the type-wheel e hasbeen set, thus effecting the rise of the printing-lever g and theprinting at the proper time, theultimate rise of the printing-lever 9once more breaking the local circuit and permitting all parts to fallback into their original position for the next transmission. To eifectthis, I continue the end of the oscillating armature c by a rod 0,which, engaging in the bottom of a pivoted rocking piece h, Fig. 2,causes a projecting nose h of this rock-piece to vibrate rapidly betweenthe arms of the fork 70, Fig. 2. The said rocking piece It and the fork7c are insulated (see Figs. 11 and 5) and are each of them a terminal inthe local battery-circuit 2 2, Fig. 7, which circuit includes theprinting-electromagnets f f. The rocking piece] is pivoted on aninsulated bracket 7L2 at the is thus again broken.

top of a transverse diaphragm of the box, and the fork is is also hingedupon an insulated hinge a: on the bottom and other side of the saiddiaphragm of the box.

Although the nose h of the rocking piece h is constantly makingalternate contacts with each side of the fork is all the time thealternating current is passing, the contact is so instantaneous that noeffective current passes through the electromagnetsff until thealternating current has ceased and the nose h of the rocking piece hrests for an appreciable period upon one or other of the arms of thefork is. The printing-magnets are thus energized and the printing takesplace.

The printing-lever g operates from its rising end by a link Z areturn-lever m, which on the descent of its farther end carries,attached thereto, a triangular piece 11, Fig. 2, which still furtherinsures and accentuates the contact of thenose 71 against that arm ofthe fork 70 upon which it rests, and finally upon the completion of thedownward stroke of the lever m, which is the completion of the upwardstroke of the printing-lever g, the end of the leverm strikes the end ofatransverse lever 19, Fig. 2, which, rising at its farther end, strikesa tappet q of the foFk is, which is pivoted at the bottom on ahorizontal pivot-pin 1', so that the fork is thrown right back away fromcontact with the nose h of the rocking piece h. The local circuit Theprinting lever 9 falls by its own weight into normal position, and thefork It, by a recoil-spring 8, attempts to come back to its originalposition on either side of the nose ht This, however, it cannot do atonce, or the local circuit would be again made, but is prevented fromdoing so by striking against the insulated tip 25 of the nose h. S0 soonas the alternating circuit is again started the vibrationof the nose hallows the printing when the alternating current has ceased once more.

Having now described this invention, what I claim, and desire to secureby Letters Patent, is-

1. In combination in a printing-telegraph instrument, a vibratingarmature two electromagnetsin a transmitted alternating current; anextension of said vibrating armature connected as an insulated terminalin a relaycircuit; and a divided contact, also con nected as aninsulated terminal in said relay-circuit, situated on either side ofsaid vibrating eX- tension; the vibrating contact being ineffect- We toclose the relay-circuit and to energize the printing-electromagnetstherein, until the transmitted alternating current ceases, and thevibrating extension is at rest upon one part or other of the dividedcontact.

2. In combination in a printing-telegraph instrument, a vibratingarmature two electromagnets in a transmitted alternating current; aninsulated and pivoted metallic nose,rocked thereby; an insulated tip tosaid nose; an insulated and hinged fork or divided contact, situatednormally on either side and within reach of said metallic rocking nose;a pivoted printing-lever operated by the armature of theprinting-magnets 2; and means operated by printing-lever to remove saidhinged fork from contact with said'pivoted metallic nose, to break thelocal circuit, when the printing stroke has been completed,substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

LOUIS MARINO OASELLA. Witnesses:

RICHARD A. HOFFMANN, CHARLES CARTER.

